A power transformer sheath

Abstract

This disclosure relates to the technical field of power transformer sheaths. One embodiment of this disclosure provides a power transformer sheath, comprising: a main sheath and a secondary sheath, the secondary sheath being disposed within the main sheath; a tightening assembly disposed between the main and secondary sheaths; a stabilizing assembly disposed at the bottom of the main and secondary sheaths; and a supporting assembly disposed outside the secondary sheath. The tightening assembly includes a pair of sleeve grooves, respectively formed at the upper and lower ends of the side surface of the main sheath. A pair of sleeve brackets are provided at the top and bottom of the secondary sheath, and the sleeve brackets are fitted into the sleeve grooves. One end of each sleeve bracket has an external lug, and the external lugs are fixedly connected by screws. A pair of retaining grooves are formed on the inner surfaces of the main and secondary sheaths, and sealing rings are embedded in the retaining grooves. This technical solution solves the technical problems in the prior art where improved structures are difficult to disassemble, hindering later maintenance and replacement, and resulting in poor sealing performance, gaps at the transformer terminals, and easy entry of dust.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of power transformer sheaths, and more specifically, to a power transformer sheath. Background Technology

[0002] In power systems, power transformers are core equipment for power transmission and distribution, and their safe operation directly affects the stability of the power grid. Transformer sheaths, as crucial components protecting transformers from external environmental influences, are of paramount importance in terms of performance. However, traditional power transformer sheaths suffer from significant problems in practical applications, such as difficulty in disassembling their structure and poor sealing performance, severely impacting transformer maintenance efficiency and operational safety.

[0003] Traditional transformer sheaths typically employ an integrated or bolt-fixed structure, requiring the entire sheath to be fitted over the transformer during installation. Disassembly necessitates removing surrounding connecting wires and fixing components, a cumbersome and time-consuming process. When internal transformer components require maintenance or the sheath itself ages and becomes damaged, the complex disassembly process not only increases the workload of maintenance personnel but may also lead to a decrease in the fit between the sheath and the transformer due to frequent disassembly, further shortening the equipment's lifespan. Furthermore, some sheaths utilize a multi-segment splicing design, but the complex connection structures between each segment can easily cause problems such as component jamming and thread stripping during disassembly, resulting in low maintenance efficiency and failing to meet the power system's demand for rapid transformer maintenance.

[0004] In terms of sealing performance, traditional sheaths have significant deficiencies in protecting the terminals of transformers. The sheaths at the terminals are mostly simple wrap-around designs, making it difficult to tightly fit the complex structure of the terminals and easily creating gaps. Dust, moisture, and fine particles in the air can enter the transformer interior through these gaps, accumulating on the terminals and nearby components. This not only affects the reliability of electrical connections but can also lead to localized overheating due to dust accumulation, causing equipment failure. Especially in windy, sandy, or humid environments, poorly sealed sheaths accelerate the aging and corrosion of internal transformer components, seriously threatening the safe operation of the power grid.

[0005] As power systems evolve towards intelligence and high reliability, the shortcomings of traditional sheaths in terms of ease of maintenance and sealing protection are becoming increasingly apparent. Developing new power transformer sheaths with easy-to-disassemble structures and excellent sealing performance is of great significance for improving transformer maintenance efficiency, extending equipment lifespan, and ensuring the safe and stable operation of the power grid. It is also an inevitable choice to meet the operation and maintenance needs of modern power systems. Utility Model Content

[0006] To overcome the above-mentioned defects, the embodiments of this disclosure provide a power transformer sheath, which solves the technical problems in the prior art where the improved structure is not easy to disassemble, which is not conducive to later maintenance and replacement, and the sealing performance is poor, with gaps at the terminals of the transformer at both ends, making it easy for dust to enter.

[0007] According to one aspect, at least one embodiment of this disclosure provides a power transformer sheath, comprising:

[0008] A main sleeve and a secondary sleeve, wherein the secondary sleeve is disposed within the main sleeve;

[0009] A tightening assembly is disposed between the main sleeve and the auxiliary sleeve;

[0010] A stabilizing component is disposed at the bottom of the main sleeve and the secondary sleeve;

[0011] Support assembly, the support assembly being disposed outside the sub-sleeve;

[0012] The tightening assembly includes a pair of sleeve grooves, which are respectively formed at the upper and lower ends of the side surface of the main sleeve. The top and bottom of the secondary sleeve are each provided with a pair of sleeve brackets, which are fitted into the sleeve grooves.

[0013] As a further technical solution, one end of the sleeve is provided with an outer ear, and the outer ears are fixedly connected by screws. A pair of slots are opened on the inner surfaces of the main sleeve and the secondary sleeve, and a sealing ring is embedded in the slot.

[0014] As a further technical solution, the stabilizing component includes a sleeve, the bottom of which is provided with an adhesive layer, and a pair of mating grooves are formed around the side surface of the sleeve. A pair of mating strips are provided on the inner sides of both the main sleeve and the secondary sleeve, and the mating strips are embedded in the mating grooves.

[0015] As a further technical solution, the support component includes an upper block and a lower block. The upper block is fixed to the upper end of the sub-sleeve side surface, and the lower block is fixed to the lower end of the sub-sleeve side surface. A connecting groove is formed on the surface of the upper block.

[0016] As a further technical solution, a through hole is provided on the surface of the lower block, a support rod is inserted into the connecting groove, the lower end of the support rod is inserted into the through hole, and a nut is screwed to the lower end of the support rod.

[0017] As a further technical solution, the connecting groove and the upper cross-section of the support rod are T-shaped.

[0018] As a further technical solution, both the main sleeve and the secondary sleeve are wave-shaped retractable structures.

[0019] As a further technical solution, all the frames are C-shaped structures with arc transitions.

[0020] The beneficial effects of the embodiments disclosed herein are as follows:

[0021] 1. In this disclosure, the sleeve assembly replaces the traditional integrated structure with the nested design of the sleeve groove and the sleeve frame. During disassembly, the main sleeve and the auxiliary sleeve can be separated simply by loosening the screws, which solves the problem of the traditional sleeve being difficult to disassemble. The sealing ring in the slot fills the gap when the sleeve frame and the sleeve groove are engaged, preventing dust and moisture from entering and improving the sealing performance. The C-shaped sleeve frame with arc transition not only enhances the connection firmness, but also avoids component damage caused by stress concentration, making maintenance and replacement more convenient.

[0022] 2. In this disclosure, the adhesive layer of the stabilizing component provides initial adhesion, ensuring that the sheath fits tightly against the transformer surface. The mating strip and the mating groove form a mechanical lock, preventing the sheath from slipping due to vibration during operation. The double fixing structure solves the problem of easy loosening after traditional sheath installation, adapts to stable installation under different working conditions, avoids protection failure due to positional displacement, and improves the reliability of sheath use.

[0023] 3. In this disclosure, the support assembly forms a rigid support after the main sleeve and the auxiliary sleeve expand and contract with an adjustable support rod. The T-shaped connecting groove engages with the upper end of the support rod to prevent the support rod from being pulled out. After the nut is tightened, the relative displacement of the sheath is restricted. This solves the problem of structural instability after the expansion and contraction of the traditional sheath, enabling the sheath to adapt to the needs of different transformer sizes or temperature changes. At the same time, it is easy to adjust the support position according to maintenance needs, ensuring the structural stability and maintenance convenience of the sheath. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0025] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0026] Figure 2 This is an isometric drawing of the present disclosure;

[0027] Figure 3 This is an isometric sectional view of the present disclosure;

[0028] Figure 4 This is another isometric sectional view of this disclosure;

[0029] In the diagram: 1. Main sleeve; 2. Secondary sleeve; 3. Tightening assembly; 3-1. Sleeve groove; 3-2. Sleeve frame; 3-3. Outer ear; 3-4. Slot; 3-5. Sealing ring; 4. Stabilizing assembly; 4-1. Sleeve base; 4-2. Adhesive layer; 4-3. Connecting groove; 4-4. Connecting strip; 5. Support assembly; 5-1. Upper block; 5-2. Lower block; 5-3. Connecting groove; 5-4. Through hole; 5-5. Support rod; 5-6. Nut. Detailed Implementation

[0030] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0031] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0033] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0035] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] like Figures 1-4 As shown, it illustrates a power transformer sheath according to an embodiment of the present disclosure, comprising:

[0037] A main sleeve 1 and a secondary sleeve 2, wherein the secondary sleeve 2 is disposed inside the main sleeve 1;

[0038] A tightening assembly 3 is disposed between the main sleeve 1 and the secondary sleeve 2;

[0039] Stabilizing component 4 is disposed at the bottom of the main sleeve 1 and the secondary sleeve 2;

[0040] Support component 5, which is disposed outside the sub-sleeve 2;

[0041] The tightening assembly 3 includes a pair of sleeve grooves 3-1, which are respectively opened at the upper and lower ends of the side surface of the main sleeve 1. The top and bottom of the secondary sleeve 2 are provided with a pair of sleeve brackets 3-2, which are fitted into the sleeve grooves 3-1. One end of the sleeve bracket 3-2 is provided with an outer ear 3-3, which are fixedly connected by screws. The inner surfaces of the main sleeve 1 and the secondary sleeve 2 are provided with a pair of retaining grooves 3-4, and a sealing ring 3-5 is embedded in the retaining grooves 3-4.

[0042] In some examples, a fastening assembly 3 is designed to achieve a secure connection between the main sleeve 1 and the secondary sleeve 2. This assembly is based on a pair of sleeve grooves 3-1 opened at the upper and lower ends of the side surface of the main sleeve 1. The sleeve brackets 3-2 at the top and bottom of the secondary sleeve 2 can be precisely fitted into the sleeve grooves 3-1. The outer ears 3-3 at one end of the sleeve brackets 3-2 are fixed by screws to form a rigid connection structure. The grooves 3-4 on the inner surfaces of the main sleeve 1 and the secondary sleeve 2 are fitted with sealing rings 3-5. When the sleeve brackets 3-2 and the sleeve grooves 3-1 are fastened, the sealing rings 3-5 are squeezed to fill the gaps and prevent external moisture and dust from entering.

[0043] Through the nesting and cooperation of the sleeve groove 3-1 and the sleeve frame 3-2, the tightening effect of the screws, and the sealing design of the sealing ring 3-5, the sleeve tightening assembly 3 achieves a tight connection between the main sleeve 1 and the auxiliary sleeve 2, ensuring the overall protective performance of the transformer sheath.

[0044] like Figures 1-4 As shown in the figure, the stabilizing component 4 in this embodiment includes a sleeve 4-1, an adhesive layer 4-2 is provided at the bottom of the sleeve 4-1, a pair of mating grooves 4-3 are provided around the side surface of the sleeve 4-1, and a pair of mating strips 4-4 are provided on the inner side of both the main sleeve 1 and the secondary sleeve 2, and the mating strips 4-4 are embedded in the mating grooves 4-3.

[0045] In some examples, to enhance the stability of the sheath after installation, a stabilizing component 4 is designed. This component uses the adhesive layer 4-2 at the bottom of the sleeve 4-1 as the initial fixing structure. During installation, the adhesive layer 4-2 can adhere to the transformer surface to provide basic adhesion. The mating groove 4-3 on the side surface of the sleeve 4-1 is fitted with the mating strip 4-4 on the inner side of the main sleeve 1 and the auxiliary sleeve 2. When the main sleeve 1 and the auxiliary sleeve 2 are fitted onto the sleeve 4-1, the mating strip 4-4 is embedded in the mating groove 4-3 to form a mechanical lock and prevent the sheath from sliding axially.

[0046] The dual fixing design of the adhesive layer 4-2 and the mating structure can adapt to different working conditions on the transformer surface, ensuring that the sheath remains stable during operation and preventing it from falling off due to vibration or other factors.

[0047] like Figures 1-4 As shown in the figure, the support component 5 in this embodiment includes an upper block 5-1 and a lower block 5-2. The upper block 5-1 is fixed to the upper end of the side surface of the sub-sleeve 2, and the lower block 5-2 is fixed to the lower end of the side surface of the sub-sleeve 2. A connecting groove 5-3 is formed on the surface of the upper block 5-1, and a through hole 5-4 is formed on the surface of the lower block 5-2. A support rod 5-5 is inserted into the connecting groove 5-3, and the lower end of the support rod 5-5 is inserted into the through hole 5-4. A nut 5-6 is screwed onto the lower end of the support rod 5-5.

[0048] In some examples, a support assembly 5 is designed to keep the structure fixed after the main sleeve 1 and the auxiliary sleeve 2 expand and contract. This assembly consists of an upper block 5-1 fixed to the upper end of the side surface of the auxiliary sleeve 2 and a lower block 5-2 fixed to the lower end. When the connecting groove 5-3 of the upper block 5-1 is aligned with the through hole 5-4 of the lower block 5-2, the support rod 5-5 can be inserted into the connecting groove 5-3 and pass through the through hole 5-4. The lower end is tightened and fixed by the nut 5-6. When the main sleeve 1 and the auxiliary sleeve 2 expand and contract due to temperature changes or installation requirements, the insertion depth of the support rod 5-5 can be adjusted. After being locked by the nut 5-6, the support rod 5-5 forms a rigid support column, which restricts the relative displacement of the main sleeve 1 and the auxiliary sleeve 2 and prevents the sleeve from deforming or failing due to excessive expansion and contraction.

[0049] Through the coordinated action of the upper block 5-1, the lower block 5-2, the support rod 5-5, and the nut 5-6, the support assembly 5 provides stable support for the telescopic sheath, ensuring its structural reliability during long-term use.

[0050] For example, such as Figure 3 As shown, the connecting groove 5-3 and the upper cross-section of the support rod 5-5 form a T-shape.

[0051] In some examples, the T-shaped structure enables the support rod 5-5 to pull the upper block 5-1 downwards, and the upper end of the support rod 5-5 can be locked in the connecting groove 5-3. Through the interference fit, it cannot be pulled out after insertion.

[0052] For example, such as Figure 3 As shown, both the main sleeve 1 and the secondary sleeve 2 are wavy, expandable structures.

[0053] In some examples, the wavy structure allows the main sleeve 1 and the secondary sleeve 2 to have a telescopic effect, which can adapt to the installation of protection in a variety of situations.

[0054] For example, such as Figure 4 As shown, the sleeves 3-2 are all C-shaped structures with arc transitions.

[0055] In some examples, the C-shaped structure allows the two sleeves 3-2 to fit together and hold the main sleeve 1 tightly, resulting in a stronger and more secure fit that will not fall off.

[0056] In actual use: Place the auxiliary sleeve 2 inside the main sleeve 1, so that the top and bottom sleeve brackets 3-2 of the auxiliary sleeve 2 are respectively embedded into the upper and lower sleeve grooves 3-1 on the side surface of the main sleeve 1. Fix it by screwing through the outer ears 3-3 at one end of the sleeve bracket 3-2. Embed the sealing ring 3-5 into the grooves 3-4 on the inner walls of the main sleeve 1 and the auxiliary sleeve 2 to complete the installation of the tightening assembly 3. Adhere the adhesive layer 4-2 at the bottom of the sleeve base 4-1 to the transformer surface. The mating strips 4-4 on the inner sides of the main sleeve 1 and the auxiliary sleeve 2 are correspondingly embedded into the mating strips on the side surface of the sleeve base 4-1. Within the groove 4-3, the stabilizing component 4 is fixed. The upper block 5-1 is fixed at the upper end and the lower block 5-2 is fixed at the lower end on the outer side of the secondary sleeve 2. The upper end of the support rod 5-5 is inserted into the connecting groove 5-3 of the upper block 5-1, and the lower end passes through the through hole 5-4 of the lower block 5-2 and is tightened with a nut 5-6. The T-shaped support rod 5-5 restricts the relative displacement between the main sleeve 1 and the secondary sleeve 2. The wavy structure of the main sleeve 1 and the secondary sleeve 2 can be adjusted according to the size of the transformer. The C-shaped sleeve frame 3-2 with arc transition ensures a tight fit when nested.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A power transformer sheath, characterized in that, include: A main sleeve (1) and a secondary sleeve (2), wherein the secondary sleeve (2) is disposed inside the main sleeve (1); A tightening assembly (3) is disposed between the main sleeve (1) and the secondary sleeve (2); A stabilizing component (4) is disposed at the bottom of the main sleeve (1) and the secondary sleeve (2); Support component (5), said support component (5) being disposed outside the sub-sleeve (2); The tightening assembly (3) includes a pair of sleeve grooves (3-1), which are respectively opened at the upper and lower ends of the side surface of the main sleeve (1). The top and bottom of the secondary sleeve (2) are provided with a pair of sleeve brackets (3-2), which are fitted into the sleeve grooves (3-1).

2. The power transformer sheath according to claim 1, characterized in that, The sleeve (3-2) is provided with an outer ear (3-3) at one end, and the outer ears (3-3) are fixedly connected by screws. The inner surfaces of the main sleeve (1) and the secondary sleeve (2) are provided with a pair of slots (3-4), and a sealing ring (3-5) is embedded in the slot (3-4).

3. The power transformer sheath according to claim 1, characterized in that, The stabilizing component (4) includes a sleeve (4-1), the bottom of which is provided with an adhesive layer (4-2), and a pair of mating grooves (4-3) are provided around the side surface of the sleeve (4-1). A pair of mating strips (4-4) are provided on the inner side of both the main sleeve (1) and the secondary sleeve (2), and the mating strips (4-4) are embedded in the mating grooves (4-3).

4. The power transformer sheath according to claim 1, characterized in that, The support component (5) includes an upper block (5-1) and a lower block (5-2). The upper block (5-1) is fixed to the upper end of the side surface of the sub-sleeve (2), and the lower block (5-2) is fixed to the lower end of the side surface of the sub-sleeve (2). A connecting groove (5-3) is provided on the surface of the upper block (5-1).

5. A power transformer sheath according to claim 4, characterized in that, The lower block (5-2) has a through hole (5-4) on its surface. A support rod (5-5) is inserted into the connecting groove (5-3). The lower end of the support rod (5-5) is inserted into the through hole (5-4). The lower end of the support rod (5-5) is connected to a nut (5-6) by screwing it in.

6. A power transformer sheath according to claim 5, characterized in that, The connecting groove (5-3) and the upper cross-section of the support rod (5-5) form a T-shape.

7. A power transformer sheath according to claim 1, characterized in that, Both the main sleeve (1) and the secondary sleeve (2) are wavy, expandable structures.

8. A power transformer sheath according to claim 1, characterized in that, The frames (3-2) are all C-shaped structures with an arc transition.

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